> in martial arts you have even more stances, rotation around more axes and arrhythmic moves.

I wonder how true this is. Specifically I think you could simplify the moves into steps with "who hits who" states. You could normalise out the rhythm, following the "everything's in 4/4 if you don't count like a nerd" idea.

So you'd end up with just the key frames of either contacts/impact or change of the movement direction. Would martial arts really have even more variety here?